Evidence of Sex Differentiation Based on Morphological Traits During the Early Development Stage of Mud Crab Scylla paramamosain.
Evidence of Sex Differentiation Based on Morphological Traits During the Early Development Stage of Mud Crab Scylla paramamosain.
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DOI：
10.3389/fvets.2021.712942
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发表时间：
2021
影响因子：
3.2
通讯作者：
Ma H
中科院分区：
文献类型：
--
作者：
Cui W;Fang S;Lv L;Huang Z;Lin F;Wu Q;Zheng H;Li S;Zhang Y;Ikhwanuddin M;Ma H
为了揭示Scylla paramamosain泥蟹在形态上的性别差异及其在发育阶段出现的时间，我们对与性别相关的形态特征进行了测量、观察和生物统计学分析。为了揭示性别间的形态差异，本研究首先测量了S. paramamosain在蟹发育阶段的腹部宽度（AW）、甲壳长度（CL）和甲壳宽度（CW）的形态特征。相关分析和通径分析表明，第3腹宽（AW3）和第4腹宽（AW4）的性别二态性可用于螃蟹第6期的性别鉴定。在逐步判别分析和标准化性状的基础上，构建了可用于C - VI期小蟹性别鉴定的性别判别方程。通过解剖显微镜和扫描电镜对cviii期小蟹第二性征和腹部形态（形状和多足类）的观察表明，C - VIII期小蟹可根据腹部形状进行性别鉴定；同时，在cii阶段以多足体差异为主，在ci阶段以性腺孢子的有无为主。本研究结果有助于提高S. paramamosain发育早期性别鉴定的准确性，促进对性别形态分化机制的认识。
In order to uncover the sexual difference in morphology and how early they appear during the development stage of mud crab Scylla paramamosain, we measured, observed, and biostatistically analyzed morphological traits related to sex. For unveiling the morphological differences between sexes, morphological traits involving abdomen width (AW), carapace length (CL), and carapace width (CW) were first measured during the crablet development stage of S. paramamosain in the present study. The correlation analyses and path analyses exhibited that sexual dimorphism in the third abdomen width (AW3) and fourth abdomen width (AW4) could be used for sex identification from stage C VI (stage VI of crablet). Based on the stepwise discriminant analysis and standardized traits, a sex discriminant equation was constructed, which is capable for sex identification in crablets from stage C VI. Observations for secondary sexual traits and abdomen morphology (shape and pleopods) using a dissecting microscope or scanning electron microscope indicated that sexes are easily identified at stage C VIII according to the abdomen shape; meanwhile, at stage C II based on pleopod difference, and at stage C I by the presence or absence of gonopores. The findings in this study contribute greatly to the accuracy of sex identification of S. paramamosain during the early development stage, which promotes the understanding of the morphological differentiation mechanism of sex.
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影响因子：
1.3
作者：
Antonio Baeza, J.;Anderson, Joshua R.;Behringer, Donald C.
通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
1.3
作者：
Torres MV;Collins PA;Giri F
通讯作者：
Giri F
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作者：
Malison, Jeffrey A.;Held, James A.;Kaatz, Sarah E.
通讯作者：
Kaatz, Sarah E.
DOI：
10.1017/s0025315412000720
发表时间：
2013-05-01
影响因子：
1.2
作者：
Peiro, Douglas F.;Antonio Baeza, J.;Mantelatto, Fernando L.
通讯作者：
Mantelatto, Fernando L.